Air inlet hose for Dellorto 30mm PHBH Carb

I'm looking at a way to get fresh air to the carb, rather than suck the air from under the panel. I really don't want to drill a huge hole in the SX200 panel.
Anybody know which air hoses will fit the Dellorto 30mm PHBH, preferably with the bell mouth on?
For info, I have a 13 litre tank taking up the space of the air box, with a little bit of a gap between the tank and the toolbox. The toolbox is staying, as there's so little storage anyhow.
The plan is to find a route to supply the fresh air to the carb utilising a 90 degree air hose.
Any info, particularly home brew air filter info appreciated, cheers.
Anybody know which air hoses will fit the Dellorto 30mm PHBH, preferably with the bell mouth on?
For info, I have a 13 litre tank taking up the space of the air box, with a little bit of a gap between the tank and the toolbox. The toolbox is staying, as there's so little storage anyhow.
The plan is to find a route to supply the fresh air to the carb utilising a 90 degree air hose.
Any info, particularly home brew air filter info appreciated, cheers.